Rotary isolating switch

Abstract

A rotary disconnecting switch comprises a first switch unit and a second switch unit which are arranged in a stacked mode, the first switch unit comprises a first shell, a moving contact, a first static contact and a second static contact, and the moving contact, the first static contact and the second static contact are arranged in the first shell; the second switch unit comprises a second shell, and a moving contact, a third static contact and a fourth static contact which are arranged in the second shell; the first static contact comprises a first wiring part extending out of the first shell, the second static contact comprises a second wiring part extending out of the first shell, and the first wiring part and the second wiring part are located on the two opposite side faces of the first shell. The third static contact comprises a third wiring part, the fourth static contact comprises a fourth wiring part, and the third wiring part and the fourth wiring part are located on the same side face of the second shell. The method can be suitable for wiring modes in various application scenes, is not limited to a single wiring mode, and is more convenient in wiring and higher in wiring efficiency.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a rotary disconnect switch. Background Technology

[0002] Rotary disconnect switches serve to isolate power supplies and break circuits. With the rapid development of the photovoltaic field, disconnect switches have also been widely used. In recent years, increasingly higher requirements have been placed on the current carrying capacity and temperature rise performance of disconnect switches. Rotary disconnect switches include switch contacts, which in turn include moving contacts and stationary contacts. The circuit is broken and connected by opening and closing the moving contacts and stationary contacts.

[0003] In the existing technology, the wiring method of the stationary contact of rotary disconnect switches is relatively simple and cannot be applied to wiring methods in various application scenarios. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary disconnect switch that includes two wiring methods.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a rotary disconnect switch, comprising at least one first switch unit and at least one second switch unit stacked together.

[0007] The first switch unit includes a first housing, and a moving contact, a first stationary contact, and a second stationary contact disposed within the first housing. The first stationary contact and the second stationary contact are fixedly disposed on both sides of the moving contact, and the moving contact is rotatably disposed to contact or disconnect from the first stationary contact and the second stationary contact.

[0008] The second switch unit includes a second housing, and a moving contact, a third stationary contact, and a fourth stationary contact disposed within the second housing. The third stationary contact and the fourth stationary contact are fixedly disposed and located on both sides of the moving contact. The moving contact is rotatably disposed to contact or disconnect from the third stationary contact and the fourth stationary contact.

[0009] The first stationary contact includes a first wiring portion extending out of the first housing, and the second stationary contact includes a second wiring portion extending out of the first housing. The first wiring portion and the second wiring portion are located on opposite sides of the first housing.

[0010] The third stationary contact includes a third wiring portion, and the fourth stationary contact includes a fourth wiring portion. The third wiring portion and the fourth wiring portion are located on the same side of the second housing.

[0011] In one possible implementation, the second, third, and fourth wiring portions are located on the same side of the rotary disconnector.

[0012] In one possible implementation, the first wiring portion includes a screw terminal block with a threaded hole, and the second, third, and fourth wiring portions all include terminal blocks with a flat structure perpendicular to the side extending from the terminal block.

[0013] In one possible implementation, the first housing includes a second notch and a first notch, the screw terminal block is located in the second notch, and the terminal block extends from the first notch; the second switch unit includes two first notches, and the terminal blocks of the third and fourth terminals extend from the two first notches respectively; the first and second notches include a first limiting groove, and the bottom of the first and second housings extends a first limiting plate to the next layer along the stacking direction, the first limiting plate extending into the first limiting groove and abutting against the stationary contact.

[0014] In one possible implementation, the first switching unit is a positive input pin and the second switching unit is a negative input pin; or, the first switching unit is a negative input pin and the second switching unit is a positive input pin; the thickness of the first housing closer to the second housing is greater than the thickness of the first housing farther from the second housing, and / or the thickness of the second housing closer to the first housing is greater than the thickness of the second housing farther from the first housing.

[0015] In one possible implementation, an insulating side plate is provided on the side of the first housing where the first wiring portion is located, the insulating side plate extending outward from the bottom of the first housing perpendicular to the housing stacking direction; at least one side of the insulating side plate is provided with at least one structural reinforcing rib, the structural reinforcing rib being connected to the first housing; and / or the outer sides of the first housing and the second housing include an insulating plate, the insulating plate partially surrounding the wiring plate, and a protective platform is also provided at intervals on the side of the insulating plate away from the wiring plate it partially surrounds.

[0016] In one possible implementation, at least one arc-extinguishing grid assembly is provided within the first and second housings. The first and second housings include at least one vent hole located at an end corner. An venting channel is provided between the vent hole and the arc-extinguishing grid assembly, and an inclined guide plate is provided within the venting channel.

[0017] In one possible implementation, a first chamber is provided near the exhaust port, the first chamber is connected to the exhaust port and has a flow-limiting gap connected to the exhaust passage, the first chamber is connected to the exhaust port and has a flow-limiting gap connected to the exhaust passage.

[0018] In one possible implementation, a first flow limiting plate and a second flow limiting plate are provided in the exhaust channel. The first housing includes a vertical second sidewall and a first sidewall. The first flow limiting plate is vertically connected to the second flow limiting plate. The first flow limiting plate is parallel to the second sidewall, and the second flow limiting plate is parallel to the first sidewall, so that the first flow limiting plate, the second flow limiting plate, the second sidewall, and the first sidewall form the first chamber. The first flow limiting plate and the first sidewall are spaced apart to form a flow limiting gap. The flow guiding plate has a sloping structure. The bottom surface of the sloping structure is in contact with the first sidewall. One end of the sloping surface of the sloping structure is close to the arc extinguishing grid plate assembly, and the other end extends towards the flow limiting gap and gradually fits the first sidewall.

[0019] In one possible implementation, the second stationary contact, the third stationary contact, and the fourth stationary contact have the same structure; the second stationary contact includes a first flat plate portion and a second flat plate portion, the plane of the first flat plate portion is parallel to the plane of the second flat plate portion, and an arc-shaped bend portion connects the first flat plate portion and the second flat plate portion. The first flat plate portion includes a second connecting plate and a third connecting plate. One end of the second connecting plate is connected to the arc-shaped bend portion, and the other end is bent at an obtuse angle to the third connecting plate. The third connecting plate is used for insertion and mating with the moving contact. One end of the second flat plate portion includes a terminal block.

[0020] Compared to existing technologies, the rotary disconnect switch of this application preferably includes multiple first switch units and multiple second switch units stacked together. The first wiring portion of the first stationary contact and the second wiring portion of the second stationary contact of the first switch unit are disposed on opposite sides of the first housing. The third wiring portion of the third stationary contact and the fourth wiring portion of the fourth stationary contact of the second switch unit are respectively disposed on the same side of the second housing. This allows for wiring methods applicable to various application scenarios, and is not limited to a single wiring method. Wiring is more convenient and efficient.

[0021] In addition, the first wiring section includes a screw terminal block, and the second, third and fourth wiring sections all include terminal blocks. The second, third and fourth wiring sections are located on the same side of the rotary disconnect switch, and the terminal blocks on this side can be soldered onto the PCB board for faster installation. The screw terminal block on the side opposite to the terminal block can be fitted with screws, and screw wiring facilitates disassembly and maintenance. Attached Figure Description

[0022] Figure 1 and Figure 2 This is a schematic diagram of the structure of the rotary disconnect switch of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first switching unit of this utility model;

[0024] Figure 4This is a schematic diagram of the structure of the first housing and the first stationary contact after installation of this utility model;

[0025] Figure 5a and Figure 5b This is a schematic diagram of the structure of the first housing of this utility model;

[0026] Figure 6a and Figure 6b This is a schematic diagram of the structure of the first stationary contact of this utility model;

[0027] Figure 7a and Figure 7b This is a schematic diagram of the structure of the second stationary contact of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the second switching unit of this utility model;

[0029] The reference numerals in the attached drawings include: rotary contact assembly 11; first switching unit 101; second switching unit 102; first housing 1; first stationary contact 12; second stationary contact 13; first sidewall 141; second sidewall 142; third sidewall 143; fourth sidewall 144; screw terminal block 131; terminal block 132; second notch 152; first notch 151; insulating side plate 161; structural reinforcing rib 162; arc extinguishing grid assembly 171; vent hole 173; current guiding plate 174; first current limiting plate 175; second current limiting plate 176; current limiting notch 177; insulating plate 178; protective platform 179; first contact plate 121; second contact plate 122; Third contact plate 123; First connecting plate 124; Second limiting plate 1551; First retaining wall 1552; Second retaining wall 1553; Third retaining wall 1554; First inclined surface 1431; Second inclined surface 1521; Third inclined surface 1522; First side 125; Second side 126; First limiting plate 180; Tip protrusion 127; Chamfer 128; Arc-shaped notch 1281; First limiting groove 1523; First protrusion 181; First flat plate 133; Second flat plate 134; Arc-shaped bend 135; Second connecting plate 1331; Third connecting plate 1332; Second chamfer 1333; Notched corner 1334. Detailed Implementation

[0030] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0031] refer to Figure 1The rotary disconnect switch includes an operating mechanism unit and a switch unit stacked together. The operating mechanism unit includes an operating mechanism unit housing and an operating mechanism disposed within the operating mechanism unit housing. The switch unit includes a switch unit housing and a rotary contact assembly 11, a stationary contact, and an arc-extinguishing chamber structure disposed within the housing. The output shaft of the operating mechanism extends out of the operating mechanism unit housing and connects to the rotary contact assembly 11 to drive the rotary contact assembly 11 to rotate. The rotary contact assembly 11 includes a moving contact. The stationary contact is fixedly installed on the housing, and the moving contact is rotatably disposed. Specifically, the operating mechanism drives the rotary contact assembly 11 to rotate, and the rotation of the rotary contact assembly 11 drives the moving contact to rotate, thereby connecting or disconnecting with the stationary contact through the rotation of the moving contact. The arc-extinguishing chamber structure is located on one side of the rotary contact assembly 11 and is used to extinguish the electric arc generated at the moment the moving contact and the stationary contact are disconnected or closed. The moving contact is a long plate-shaped structure, rotatably mounted in the middle, with clamping gaps at both ends. The moving contact is clamped and connected to the stationary contact through these gaps. When the moving contact rotates to a certain angle, its end can contact and close with the stationary contact, thus connecting the circuit. When the moving contact rotates again, it can disconnect from the stationary contact, thus breaking the circuit. Rotary disconnecting switches are typically connected in series in a circuit, controlling the circuit's connection and disconnection through the connection and disconnection of the moving and stationary contacts. In this embodiment, the rotary disconnecting switch includes two stationary contacts, with the two ends of the moving contact clamping and engaging with each of the two stationary contacts respectively, controlling the circuit's connection and disconnection. This is prior art in the field.

[0032] like Figures 1-6b As shown, this application provides a rotary disconnect switch, including at least one first switch unit 101 and at least one second switch unit 102 stacked together.

[0033] The first switch unit 101 includes a first housing 1, and a rotary contact assembly 11, a first stationary contact 12, and a second stationary contact 13 disposed within the first housing 1. The first stationary contact 12 and the second stationary contact 13 are fixedly disposed and located on both sides of the rotary contact assembly 11. The rotary contact assembly 11 includes a moving contact. The rotary contact assembly 11 drives the moving contact to rotate and contact or disconnect with the first stationary contact 12 and the second stationary contact 13.

[0034] The second switch unit 102 includes a second housing, and a rotary contact assembly 11, a third stationary contact, and a fourth stationary contact disposed within the second housing. The third stationary contact and the fourth stationary contact are fixedly disposed and located on both sides of the rotary contact assembly 11. The rotary contact assembly 11 includes a moving contact. The rotary contact assembly 11 drives the moving contact to rotate and contact or disconnect with the third stationary contact and the fourth stationary contact.

[0035] like Figure 1 and Figure 2As shown, the first stationary contact 12 includes a first wiring portion, and the second stationary contact 13 includes a second wiring portion extending out of the first housing 1. The first wiring portion and the second wiring portion are located on opposite sides of the first housing 1.

[0036] like Figure 2 As shown, the third stationary contact includes a third wiring portion, and the fourth stationary contact includes a fourth wiring portion. The third wiring portion and the fourth wiring portion are located on the same side of the second housing.

[0037] The rotary disconnect switch of this application preferably includes a plurality of first switch units 101 and a plurality of second switch units 102 stacked together. The first wiring portion of the first stationary contact 12 and the second wiring portion of the second stationary contact 13 of the first switch unit 101 are disposed on opposite sides of the first housing 1. The third wiring portion of the third stationary contact and the fourth wiring portion of the fourth stationary contact of the second switch unit 102 are respectively disposed on the same side of the second housing. This allows for wiring methods applicable to various application scenarios, and is not limited to a single wiring method. Wiring is more convenient and more efficient.

[0038] Preferred, such as Figure 1 and Figure 2 As shown, the first switch unit 101 is a positive input pin, used for electrical connection to the positive input port, and the second switch unit 102 is a negative input pin, used for electrical connection to the negative input port; or, the first switch unit 101 is an N negative input pin, used for electrical connection to the negative input port, and the second switch unit 102 is a positive input pin, used for electrical connection to the positive input port.

[0039] Furthermore, such as Figure 1 and Figure 2 As shown, the thickness of the first housing 1 closer to the second housing is greater than the thickness of the first housing 1 farther from the second housing and / or the thickness of the second housing closer to the first housing 1 is greater than the thickness of the second housing farther from the first housing 1, which can increase the creepage distance between the positive and negative poles and improve the insulation protection performance.

[0040] Preferred, such as Figure 1 and Figure 2 As shown, the second wiring portion, the third wiring portion, and the fourth wiring portion are located on the same side of the rotary disconnect switch, and the rotary disconnect switch can be fixed on the same side.

[0041] Furthermore, such as Figure 3 , Figure 4 and Figure 8As shown, the first housing 1 has a rectangular structure, including a first side wall 141, a second side wall 142, a third side wall 143, and a fourth side wall 144 connected in sequence by right angles, and a bottom wall located at the bottom of the first housing 1. Preferably, the first housing 1 also has a top wall opposite to the first housing 1. The second housing is similar to the first housing 1, so the first switch unit 101 and the second switch unit 102 can be stacked. Preferably, in this embodiment, the bottom wall of the upper first housing 1 or the second housing serves as the top wall of the lower first housing 1 or the second housing. Of course, the first housing 1 or the second housing can also have an independent top wall. The first wiring portion is located on the third side wall 143 of the first housing 1, the second wiring portion is located on the first side wall 141 of the first housing 1, and the third and fourth wiring portions are located on the first side wall 141 of the second housing. Figure 3 This is a schematic diagram of the structure of the first switching unit 101 of this utility model; Figure 8 This is a schematic diagram of the structure of the second switching unit 102 of this utility model.

[0042] Preferred, such as Figure 1 and Figure 2 As shown, in this embodiment, the first wiring portion is a screw terminal, which includes a screw terminal plate 131. The screw terminal plate 131 includes a threaded hole, and a screw passes through the pressure plate and is installed in the threaded hole. A screw can press the conductor between the pressure plate and the screw terminal plate 131. The second, third, and fourth wiring portions are plate-type terminals, each including a terminal plate 132. In this embodiment, the terminal plate 132 includes a straight structure perpendicular to the side of the first housing 1 or the second housing extending from the terminal plate 132. It can be used for soldering wiring or wiring by clamping, etc. In this embodiment, the terminal plates 132 of the first switch unit 101 and the second switch unit 102 can be soldered onto the PCB board, making installation faster. The side of the first switch unit 101 away from the PCB board is the screw terminal plate 131, and wiring is done by tightening the screw, which facilitates disassembly and maintenance. Of course, in other embodiments, the first wiring portion of the first switch unit 101 can also be a terminal plate 132.

[0043] Furthermore, such as Figure 5a and Figure 5bAs shown, the first housing 1 includes a second notch 152 and a first notch 151. The screw terminal block 131 is located within the second notch 152, which is used for mounting the screw assembly into the threaded hole of the screw terminal block 131. The terminal block 132 extends from the first notch 151 for soldering onto the PCB board. The second housing of the second switch unit 102 includes two first notches 151, and the terminal blocks 132 of the third and fourth wiring portions extend from the two first notches 151 respectively for soldering onto the PCB board. Figure 5a and Figure 5b This is a schematic diagram of the structure of the first shell 1.

[0044] Furthermore, such as Figure 1 and Figure 2 As shown, the bottom of the first housing 1 and the second housing extends downwards perpendicular to the stacking direction of the housing to form a first limiting plate 180. The first limiting plate 180 extends into the first notch 151 and the second notch 152, limiting the wiring plate 132 and the screw wiring plate 131 in the stacking direction of the first housing 1 and the second housing. Specifically, in a preferred embodiment, the positions of the first notch 151 and the second notch 152 each include two opposing first limiting slots. The two sides of the first limiting plate 180 are inserted into the two first limiting slots, which can limit the housing of the next layer of the stacked switch unit, and can also abut against the stationary contact in the housing to limit the stationary contact.

[0045] Preferred, such as Figures 1-5b As shown, an insulating side plate 161 is provided on one side of the first housing 1 where the first wiring part is provided. The insulating side plate 161 extends outward from the bottom of the first housing 1 perpendicular to the housing stacking installation direction. The insulating side plate 161 is used to insulate the first wiring part of the adjacent switch unit to prevent short circuit.

[0046] Furthermore, such as Figure 1 As shown, at least one side of the insulating side plate 161 is provided with at least one structural reinforcing rib 162, which is connected to the first housing 1 to enhance the structural strength of the insulating side plate 161.

[0047] Preferred, such as Figure 3 As shown, at least one arc-extinguishing grid plate group 171 is provided in the first housing 1 and the second housing. The first housing 1 and the second housing include at least one exhaust hole 173 located at the end corner. An exhaust channel is provided between the exhaust hole 173 and the arc-extinguishing grid plate group 171 for discharging the high-temperature gas generated by electric arc burning from the exhaust hole 173 along the exhaust channel. Preferably, an inclined guide plate 174 is provided in the exhaust channel.

[0048] Furthermore, such as Figure 3 As shown, a first chamber is provided near the exhaust port 173. The first chamber is connected to the exhaust port 173 and is provided with a flow-limiting gap 177 that is connected to the exhaust channel. The exhaust channel is provided with a first flow limiting plate 175 and a second flow limiting plate 176. The first flow limiting plate 175 is vertically connected to the second flow limiting plate 176. The first flow limiting plate 175 is parallel to the second side wall 142, and the second flow limiting plate 176 is parallel to the first side wall 141, so that the first flow limiting plate 175, the second flow limiting plate 176, the second side wall 142, and the first side wall 141 form a rectangular first chamber. The exhaust hole 173 is located in the first chamber. The first flow limiting plate 175 and the first side wall 141 are spaced apart to form a flow limiting notch 177. The flow guiding plate 174 has a sloping structure. The bottom surface of the sloping structure is in contact with the first side wall 141. One end of the sloping surface of the sloping structure is close to the arc extinguishing grid assembly 171, and the other end extends towards the flow limiting notch 177 and gradually comes into contact with the first side wall 141. The flow limiting notch 177 is used for the passage of high-temperature gas, and the first chamber is used to restrict the backflow of high-temperature gas to avoid the backflow of gas affecting the arc extinguishing effect of the arc extinguishing grid assembly 171.

[0049] Preferred, such as Figure 7a and Figure 7b As shown, the second stationary contact 13, the third stationary contact, and the fourth stationary contact have the same structure. The second stationary contact 13 includes a first flat plate portion 133 and a second flat plate portion 134. The plane of the first flat plate portion 133 is parallel to the plane of the second flat plate portion 134. An arc-shaped bend portion 135 connects the first flat plate portion 133 and the second flat plate portion 134. The first flat plate portion 133 includes a second connecting plate 1331 and a third connecting plate 1332. One end of the second connecting plate 1331 is connected to the arc-shaped bend portion 135, and the other end is bent at an obtuse angle to the third connecting plate 1332. The third connecting plate 1332 is used for insertion and mating with the moving contact. The terminal block 132 is located at one end of the second flat plate portion 134.

[0050] Furthermore, the third connecting plate 1332 is provided with a second chamfer 1333 at the end away from the second connecting plate 1331, and the end of the second chamfer 1333 near the moving contact is provided with a notch 1334, which facilitates the insertion and cooperation with the moving contact.

[0051] Furthermore, such as Figure 2 As shown, the first housing 1 and the outer side of the second housing include an insulating plate 178. The wiring plate 132 extends to the outer side of the first housing 1 and the second housing and is separated by the insulating plate 178. This is used to enhance the insulation protection effect between adjacent stationary contacts when multiple switch units are stacked. A protective platform 179 is also provided at intervals on the side of the insulating plate 178 away from the wiring plate 132, which it semi-encircles. The protective platform 179 is used to increase the creepage distance between the upper and lower stationary contacts, thereby improving the insulation protection effect. Preferably, the insulating plate 178 is... Figure 2 The arc shape shown partially surrounds the terminal block 132.

[0052] Preferred, such as Figure 6a and Figure 6b As shown, the first stationary contact 12 includes a bent contact section and a wiring section. The contact section includes a first contact plate 121, a second contact plate 122, and a third contact plate 123, which are bent and connected in sequence. The third contact plate 123 is used to connect with the moving contact. The wiring section includes a bent first connecting plate 124 and a screw terminal plate 131. The first connecting plate 124 and the first contact plate 121 are bent and connected at a right angle. That is, the plane of the first contact plate 121 is perpendicular to the plane of the first connecting plate 124.

[0053] The first housing 1 includes a first direction limiting part, a second direction limiting part, and a third direction limiting part for limiting the first stationary contact 12. The first direction limiting part limits both ends of the contact segment in the length direction, the second direction limiting part abuts against both sides of the contact segment in the width direction, and the third direction limiting part limits the contact segment in the thickness direction. The first direction, the second direction, and the third direction are perpendicular to each other. The first stationary contact 12 includes multiple bending structures, which limit the first stationary contact 12 in three directions at the same time. This can make the first stationary contact more firmly fixed in the first housing and prevent the first stationary contact 12 from shaking when the screw terminal block 131 of the first stationary contact 12 is screwed and wired.

[0054] Preferably, the first contact plate 121 and the third contact plate 123 are parallel, and the bending angle between the first contact plate 121 and the second contact plate 122 is an obtuse angle, as is the bending angle between the first connecting plate 124 and the screw terminal plate 131.

[0055] Preferably, in other feasible embodiments, the second stationary contact 13 and the first stationary contact 12 can have the same structure, both being wired and mounted by screws.

[0056] Furthermore, such as Figure 4 As shown, the first stationary contact 12 is located at one corner of the first housing 1. The length direction of the contact segment is parallel to the second side wall 142 of the first housing 1. The length direction of the first connecting plate 124 intersects the third side wall 143 and the second side wall 142. The third side wall 143 has a second notch 152. The screw terminal plate 131 corresponds to the second notch 152.

[0057] Furthermore, such as Figure 5bAs shown, the first directional limiting portion includes a second limiting plate 1551 and a first baffle 1552 located at both ends of the contact segment, and a second baffle 1553 located on one side of the contact segment. One end of the second limiting plate 1551 abuts against one side of the first connecting plate 124, one end of the second baffle 1553 abuts against the other side of the first connecting plate 124, and the first baffle 1552 abuts against the third contact plate 123. The second directional limiting portion includes a second baffle 1553 and a third baffle 1554 distributed along the width direction. 53. The third retaining wall 1554 is parallel to the second side wall 142, and the contact section is located between the second retaining wall 1553 and the third retaining wall 1554; the third-direction limiting part includes a first limiting protrusion and a second limiting protrusion located on opposite sides of the bottom wall of the first housing 1. When multiple switch units are stacked, the first limiting protrusion and the second limiting protrusion of two adjacent first housings 1, that is, the second limiting protrusion of the upper layer switch unit and the first limiting protrusion of the lower layer switch unit, press and limit the first stationary contact 12 along the thickness direction of the contact section (that is, the third direction).

[0058] Furthermore, such as Figure 5b As shown, the second limiting plate 1551 is parallel to the second side wall 142, one end is connected to the third side wall 143, and the other end includes a first inclined surface 1431. The side of the second notch 152 near the first connecting plate 124 includes a second inclined surface 1521. The second retaining wall 1553 includes a third inclined surface 1522. The screw terminal block 131 is located inside the second notch 152. The first inclined surface 1431 and the second inclined surface 1521 both abut against the side of the first connecting plate 124 facing the second notch 152. The third inclined surface 1522 abuts against the side of the first connecting plate 124 away from the second notch 152. The first inclined surface 1431, the second inclined surface 1521, and the third inclined surface 1522 are designed to adapt to the inclined features of the first connecting plate 124, so that the first inclined surface 1431, the second inclined surface 1521, and the third inclined surface 1522 can be completely fitted with the first connecting plate 124, better limiting the first connecting plate 124 and improving the stability of the first stationary contact 12 after limiting.

[0059] Furthermore, such as Figure 5b and Figure 6aAs shown, the contact segment includes a first side 125 near the second sidewall 142 and a second side 126 away from the wiring segment. The first side 125 and the second side 126 are perpendicularly connected. The third baffle 1554 and the first baffle 1552 are connected at a right angle. The first side 125 is in contact with the third baffle 1554, and the second side 126 is in contact with the first baffle 1552. Setting the corner of the contact segment near the second sidewall 142 away from the wiring segment as a right angle, and the first baffle 1552 and the third baffle 1554 being connected at a right angle, can make the internal structure of the first housing 1 neat and simple, maximize the use of the internal space of the first housing 1, reduce the volume of the first housing 1, and at the same time, the neat structure can also provide a better limiting effect for the first stationary contact 12.

[0060] Preferred, such as Figure 4 and Figure 6a As shown, the third contact plate 123 includes a pointed protrusion 127 facing the middle of the first housing 1. A chamfer 128 is provided on the side of the pointed protrusion 127 opposite to the moving contact. An arc-shaped notch 1281 is provided at the end of the chamfer 128 near the second contact plate 122. The pointed protrusion 127 and the chamfer 128 facilitate the insertion of the first stationary contact 12 and the moving contact. The arc-shaped notch 1281 at the end of the chamfer 128 near the second contact plate 122 improves the elastic deformation capacity or geometric containment of the third contact plate 123, which can absorb manufacturing tolerances (such as the axial offset between the moving contact and the stationary contact ≤0.5mm) and assembly deviations, ensuring that the moving contact always maintains effective contact with the first stationary contact 12 when the circuit is closed. On the other hand, the straight contact surface is prone to local pressure concentration (such as edge point contact) due to the swing of the moving contact, while the arc-shaped notch 1281 distributes the pressure evenly to the entire contact area through curvature matching, reducing contact resistance and improving the service life of the moving contact and the first stationary contact 12.

[0061] Preferred, such as Figure 6a As shown, an arched portion is formed between the third contact plate 123 and the first connecting plate 124, and the arched portion includes the first contact plate 121 and the second contact plate 122. The arched portion and the third contact plate 123 have a height difference, which can form a stepped limiting effect and improve the limiting effect.

[0062] Preferred, such as Figures 5a-6b As shown, a first limiting groove 1523 is provided at the second notch 152 on the bottom wall of the first housing 1, and the bottom wall of the upper layer of the first housing 1 facing the lower layer of the first housing 1 includes a second limiting groove. The screw terminal board 131 includes a first protrusion 181 protruding to both sides along the stacking direction of the first housing 1. The two first protrusions 181 are located in the two first limiting grooves 1523, limiting and fixing the screw terminal board 131 of the first stationary contact 12.

[0063] Specifically, only one of the first limiting plate 180 extending downward from the first housing 1 and the second limiting groove opened on the bottom wall of the first housing 1 facing the next layer can be provided. The two structures can also coexist after being staggered along the through direction of the second notch 152. The first limiting plate 180 can achieve the limiting installation effect between two adjacent housing layers, and can also limit the wiring segment of the first stationary contact 12 along the stacking installation direction. The second limiting groove is used to limit a first protrusion 181 of the screw wiring plate 131. The two structures produce different effects.

[0064] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0065] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A rotary disconnect switch, comprising at least one first switch unit (101) and at least one second switch unit (102) stacked together, The first switch unit (101) includes a first housing (1), and a moving contact, a first stationary contact (12), and a second stationary contact (13) disposed in the first housing (1). The first stationary contact (12) and the second stationary contact (13) are fixedly disposed and located on both sides of the moving contact. The moving contact is rotatably disposed to contact or disconnect from the first stationary contact (12) and the second stationary contact (13). The second switch unit (102) includes a second housing, and a moving contact, a third stationary contact and a fourth stationary contact disposed in the second housing. The third stationary contact and the fourth stationary contact are fixedly disposed and located on both sides of the moving contact. The moving contact is rotatably disposed to contact or disconnect from the third stationary contact and the fourth stationary contact. Its features are, The first stationary contact (12) includes a first wiring portion extending out of the first housing (1), and the second stationary contact (13) includes a second wiring portion extending out of the first housing (1). The first wiring portion and the second wiring portion are located on opposite sides of the first housing (1). The third stationary contact includes a third wiring portion, and the fourth stationary contact includes a fourth wiring portion. The third wiring portion and the fourth wiring portion are located on the same side of the second housing.

2. The rotary disconnector according to claim 1, characterized in that The second, third, and fourth wiring portions are located on the same side of the rotary disconnect switch.

3. The rotary disconnector according to claim 1, characterized in that The first wiring part includes a screw terminal block (131), which includes a threaded hole. The second, third, and fourth wiring parts all include a terminal block (132), which includes a flat structure perpendicular to the side extending from the terminal block (132).

4. The rotary disconnector according to claim 3, characterized in that The first housing (1) includes a second notch (152) and a first notch (151), the screw terminal block (131) is located in the second notch (152), and the terminal block (132) extends out from the first notch (151); the second switch unit (102) includes two first notches (151), and the terminal blocks (132) of the third terminal part and the fourth terminal part extend out from the two first notches (151) respectively; the first notch (151) and the second notch (152) include a first limiting groove, and the bottom of the first housing (1) and the second housing extends down one layer along the stacking installation direction to form a first limiting plate (180), the first limiting plate (180) extends into the first limiting groove and abuts against the stationary contact.

5. The rotary disconnector according to claim 1, characterized in that The first switch unit (101) is a positive input pin, and the second switch unit (102) is a negative input pin; or, the first switch unit (101) is a negative input pin, and the second switch unit (102) is a positive input pin; the thickness of the first housing (1) closer to the second housing is greater than the thickness of the first housing (1) farther from the second housing, and / or the thickness of the second housing closer to the first housing (1) is greater than the thickness of the second housing farther from the first housing (1).

6. The rotary disconnector according to claim 3, characterized in that An insulating side plate (161) is provided on one side of the first housing (1) where the first wiring portion is located. The insulating side plate (161) extends outward from the bottom of the first housing (1) perpendicular to the housing stacking direction. At least one side of the insulating side plate (161) is provided with at least one structural reinforcing rib (162), which is connected to the first housing (1). And / or the outer sides of the first housing (1) and the second housing include an insulating plate (178), which partially surrounds the wiring plate (132). A protective platform (179) is also provided at intervals on the side of the insulating plate (178) away from the wiring plate (132) it partially surrounds.

7. The rotary disconnector according to claim 1, characterized in that At least one arc-extinguishing grid plate group (171) is provided in the first housing (1) and the second housing. The first housing (1) and the second housing include at least one exhaust hole (173) located at the end corner. An exhaust channel is provided between the exhaust hole (173) and the arc-extinguishing grid plate group (171). An inclined guide plate (174) is provided in the exhaust channel.

8. The rotary disconnector according to claim 7, characterized in that A first chamber is provided near the exhaust port (173), the first chamber is connected to the exhaust port (173) and is provided with a flow-limiting gap (177) connected to the exhaust channel.

9. The rotary disconnector according to claim 8, characterized in that The exhaust channel is provided with a first flow restrictor (175) and a second flow restrictor (176). The first housing (1) includes a vertical second sidewall (142) and a first sidewall (141). The first flow restrictor (175) is vertically connected to the second flow restrictor (176). The first flow restrictor (175) is parallel to the second sidewall (142), and the second flow restrictor (176) is parallel to the first sidewall (141), so that the first flow restrictor (175) and the second flow restrictor (176) are parallel to each other. The first chamber is formed by the plate (176), the second side wall (142) and the first side wall (141). The first flow limiting plate (175) and the first side wall (141) are spaced apart to form a flow limiting gap (177). The flow guiding plate (174) has a sloping structure. The bottom surface of the sloping structure is in contact with the first side wall (141). One end of the sloping surface is close to the arc extinguishing grid plate group (171), and the other end extends towards the flow limiting gap (177) and gradually fits the first side wall (141).

10. The rotary disconnector according to claim 1, characterized in that The second stationary contact (13), the third stationary contact, and the fourth stationary contact have the same structure; the second stationary contact (13) includes a first flat plate portion (133) and a second flat plate portion (134), the plane of the first flat plate portion (133) is parallel to the plane of the second flat plate portion (134), and an arc-shaped bend portion (135) is connected between the first flat plate portion (133) and the second flat plate portion (134). The first flat plate portion (133) includes a second connecting plate (1331) and a third connecting plate (1332). One end of the second connecting plate (1331) is connected to the arc-shaped bend portion (135), and the other end is bent at an obtuse angle to the third connecting plate (1332). The third connecting plate (1332) is used to plug and cooperate with the moving contact. One end of the second flat plate portion (134) includes a terminal block (132).

Images